Constraints on Sub-GeV Dark-Matter-Electron Scattering from the DarkSide-50 Experiment

Agnes, P; Albuquerque, IFM; Alexander, T; Alton, AK; Araujo, GR; Asner, DM; Ave, M; Back, HO; Baldin, B; Batignani, G; Biery, K; Bocci, V; Bonfini, G; Bonivento, W; Bottino, B; Budano, F; Bussino, S; Cadeddu, M; Cadoni, M; Calaprice, F; Caminata, A; Canci, N; Candela, A; Caravati, M; Cariello, M; Carlini, M; Carpinelli, M; Catalanotti, S; Cataudella, V; Cavalcante, P; Cavuoti, S; Cereseto, R; Chepurnov, A; Cicalò, C; Cifarelli, L; Cocco, AG; Covone, G; D'Angelo, D; D'Incecco, M; D'Urso, D; Davini, S; De Candia, A; De Cecco, S; De Deo, M; De Filippis, G; De Rosa, G; De Vincenzi, M; Demontis, P; Derbin, AV; Devoto, A; Di Eusanio, F; Di Pietro, G; Dionisi, C; Downing, M; Edkins, E; Empl, A; Fan, A; Fiorillo, G; Fomenko, K; Franco, D; Gabriele, F; Gabrieli, A; Galbiati, C; Garcia Abia, P; Ghiano, C; Giagu, S; Giganti, C; Giovanetti, GK; Gorchakov, O; Goretti, AM; Granato, F; Gromov, M; Guan, M; Guardincerri, Y; Gulino, M; Hackett, BR; Hassanshahi, MH; Herner, K; Hosseini, B; Hughes, D; Humble, P; Hungerford, EV; Ianni, A; Ianni, A; Ippolito, V; James, I; Johnson, TN; Kahn, Y; Keeter, K; Kendziora, CL; Kochanek, I; Koh, G; Korablev, D; Korga, G; Kubankin, A; Kuss, M; La Commara, M; Lai, M; Li, X; Lisanti, M

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Date

2018-09-12

Author

Agnes, P
Albuquerque, IFM
Alexander, T
Alton, AK
Araujo, GR
Asner, DM
Ave, M
Back, HO
Baldin, B
Batignani, G

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DOI

10.1103/PhysRevLett.121.111303

Abstract

© 2018 American Physical Society. We present new constraints on sub-GeV dark-matter particles scattering off electrons based on 6780.0 kg d of data collected with the DarkSide-50 dual-phase argon time projection chamber. This analysis uses electroluminescence signals due to ionized electrons extracted from the liquid argon target. The detector has a very high trigger probability for these signals, allowing for an analysis threshold of three extracted electrons, or approximately 0.05 keVee. We calculate the expected recoil spectra for dark matter-electron scattering in argon and, under the assumption of momentum-independent scattering, improve upon existing limits from XENON10 for dark-matter particles with masses between 30 and 100 MeV/c2.

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American Physical Society (APS)

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Physical Review Letters

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